According to the airport staff, two points should be paid attention to when flying with portable mobile power supply:

Firstly, mobile power supply is strictly prohibited from checking in luggage. It can only be carried on board with you, and insulation measures should be taken.

Secondly, each person can only carry up to two lithium batteries with a cumulative capacity of no more than 160Wh on board. If the capacity of a single lithium battery exceeds 100 Wh, it must be reported.

Limitation of lithium batteries seems simple. In fact, many people have wasted a lot of time at the airport for this, and even happened "running boarding, almost missed the plane". What kind of mobile power supply can go unimpeded?

Mobile power supply capacity should not exceed 25 000 mAh

In addition to mobile power, lithium batteries for laptops, cell phone batteries, and camera batteries are also included in standby charging devices. Therefore, the total capacity of the mobile power supply that passengers can carry on the plane is not 160 wh, equivalent to 43 000 mAh, but reduced to about 80 wh, that is, below 25 000 mAh, which can basically pass security inspection.

Under such standards, most brands of mobile power supply meet the requirements and can be carried on the aircraft. Taking Dejinyuan's Safeguard A1 (Model: DJY-CDB-5310A1) as an example, this 10,000 mAh mobile power supply with large capacity is equivalent to about 37Wh after conversion, which is not required to report, fully complies with the standards of the Civil Aviation Administration, but also meets the charging needs of various equipment in travel, and is very suitable for travel.

Therefore, it is not necessary to pursue large capacity blindly when choosing and purchasing mobile power supply. The capacity of the Shanzhai mobile power supply up to 30,400 mA can not guarantee the charging efficiency, and it is likely that it will not be able to take on the plane. Dejinyuan DH-10000JW mobile power supply uses polymer lithium batteries with high conversion efficiency of 93% and high security. It can charge the iPhone 4S and 5/5S at least five to six times, enough for several days during travel.